1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maksim231197 [3]
3 years ago
8

Does anyone know how to do this pls help

Mathematics
2 answers:
erica [24]3 years ago
7 0
Write:
x + 18 + 23 = 90

Next combine like terms (which is 18 + 23)

*Remember that combining like terms is adding or subtracting the numbers that are in one side of the equal sign (basically do not add 18, 23, and 90).

You will now get x + 41 = 90.

Now subtract 41 into 90
(90 - 41).

Your answer should be x = 49.

*Make sure this is the right answer by adding 49, 18, and 23 together. If it all equals to 90°, then the answer is correct.

irina [24]3 years ago
5 0

Answer:

49

Step-by-step explanation:

x+18+23=90 (right angle)

x+ 41=90

x=90-41

x= 49

You might be interested in
Suppose that 12% of test scores for the unit 1 test were above 85 and 8% were below 70. Assuming a normal
Doss [256]

Answer:

Mean = 78.2

Standard deviation = 5.8

Step-by-step explanation:

Mathematically z-score;

= (x-mean)/SD

From the question;

12% of test scores were above 85

Thus;

P( x > 85) = 12%

P(x > 85) = 0.12

Now let’s get the z-score that has a probability of 0.12

This can be obtained from the standard normal distribution table and it is = 1.175

Thus;

1.175 = (85 - mean)/SD

let’s call the mean a and the SD b

1.175 = (85-a)/b

1.175b = 85 - a

a = 85 - 1.175b ••••••••(i)

Secondly 8% of scores were below 70

Let’s find the z-score corresponding to this proportion;

We use the standard normal distribution table as usual;

P( x < 70) = 0.08

z-score = -1.405

Thus;

-1.405 =( 70-a)/b

-1.405b = 70-a

a = 70 + 1.405b ••••••(ii)

Equate the two a

70 + 1.405b = 85 - 1.175b

85 -70 = 1.405b + 1.175b

15 = 2.58b

b = 15/2.58

b = 5.81

a = 70 + 1.405b

a = 70 + 1.405(5.81)

a = 78.16

So mean = 78.2 and Standard deviation is 5.8

4 0
3 years ago
There is a new treatment to help smokers stop smoking in an experiment, 80% of 300 smokers quit after 10 days of treatment which
Thepotemich [5.8K]

Answer:

(0.755, 0.845)

Step-by-step explanation:

I got it right, on the test so trust me!

6 0
2 years ago
Miriam and Ruth are each individually applying for an $8,000, 24-month personal
IgorC [24]

Answer:

  Miriam

Step-by-step explanation:

Miriam, with her lower FICO score, is more likely to have been offered the loan with the higher interest rate.

3 0
3 years ago
How much longer is dinner than the slide show?
shutvik [7]

Answer:

35

Step-by-step explanation:

7 0
2 years ago
200 σ j=1 2j( j 3) describe the steps to evaluate the summation. what is the sum?
ziro4ka [17]

The sum of the equation is  = 5494000.

<h3>What does summation mean in math?</h3>

The outcome of adding numbers or quantities mathematically is a summation, often known as a sum. A summation always has an even number of terms in it. There may be just two terms, or there may be 100, 1000, or even a million. Some summations include an infinite number of terms.

<h3>Briefing:</h3>

Distribute 2j to (j+3).

Rewrite the summation as the sum of two individual summations.

Evaluate each summation using properties or formulas from the lesson.

The lower index is 1, so any properties can be used.

The sum is 5,494,000.

<h3>Calculation according to the statement:</h3>

\sum_{j=1}^{200} 2 j(j+3)

simplifying them we get:

\sum_{j=1}^{200} 2 j^{2}+6 j

Split the summation into smaller summations that fit the summation rules.

\sum_{j=1}^{200} 2 j^{2}+6 j=2 \sum_{j=1}^{200} j^{2}+6 \sum_{j=1}^{200} j

\text { Evaluate } 2 \sum_{j=1}^{200} j^{2}

The formula for the summation of a polynomial with degree 2

is:

\sum_{k=1}^{n} k^{2}=\frac{n(n+1)(2 n+1)}{6}

Substitute the values into the formula and make sure to multiply by the front term.

(2)$$\left(\frac{200(200+1)(2 \cdot 200+1)}{6}\right)$$

we get: 5373400

Evaluating same as above : 6 \sum_{j=1}^{200} j

we get: 120600

Add the results of the summations.

5373400 + 120600

= 5494000

The sum of the equation is  = 5494000.

To know more about  summations visit:

brainly.com/question/16679150

#SPJ4

6 0
1 year ago
Other questions:
  • Em um campeonato de vôlei, o time Maravilha obteve 6 vitórias, 4 empates e 2 derrotas nas 12 partidas disputadas. De quantas man
    13·1 answer
  • Write an equation for the translation of x ^ 2 + y ^ 2 = 25 by 6 units left and 3 units down.
    11·2 answers
  • 14 pigs are entered in the "best pig" competition at the county fair. The judges will award very special pigs with blue, red, an
    10·2 answers
  • A hiker attempting to cross a wilderness area has two GPS systems of intermittent reliability because of the areas remoteness .f
    12·1 answer
  • There are 36 students playing tag at recess. This is 6 times as many as are playing hopscotch. Which model shows the comparison
    9·1 answer
  • Find the value of x. 5.1 perp and angle bisectors geo
    14·1 answer
  • What is 86 + (-32) ?
    13·2 answers
  • True or false dilations always increase the length of time segments ​
    11·1 answer
  • Describe one exercise you did that helps improve your striking and your reaction time skills (at least one of your exercises mus
    9·2 answers
  • What decimal is equivalent to 4/100 + 5/10
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!